Cast 7
Tom Baker
The Doctor
Mary Tamm
Romana
John Leeson
K-9 (voice)
Beatrix Lehmann
Professor Rumford
Susan Engel
Vivien Fay
Nicholas McArdle
De Vries
Elaine Ives-Cameron
Martha
Crew 10
Graham Williams
Producer
David Fisher
Writer
Darrol Blake
Director
Dudley Simpson
Original Music Composer
Anthony Read
Script Editor
Perry Brahan
Special Effects Assistant
Elizabeth Parker
Special Sound Effects
Mat Irvine
Visual Effects Designer
Mitch Mitchell
Visual Effects
Delia Derbyshire
Theme Song Performance